Device for thawing drain-pipes.



L. A. BRENNAR.

DEVICE FOR THAWING DRAIN PIPES.

APPLICATION FILED FEB. 20, I9I8.

Patented Apr. 8, 1919.

LEWIS A. BRENNAR, OF BRANDONVILLE, PENNSYLVANIA.

DEVICE FOR THAWING- DRAIN-PIPES.

Specification of Letters Patent.

Patented Apr. 8, 1919.

Application filed February 20, 1918. Serial No. 218,363.

T all whom t may concern.'

Be it known that I, LEWIS A. BRENNER, a citizen of the United Sta-tes,residing vat Brandonville, in the county of Schuylkill and State ofPennsylvania, have invented new and useful Improvements in Devices forThawing Drain-Pipes, of which the following is a specification.

This invention relates to devices for thawing drain pipes, and oneobject is to provide for forcing a blast of hot air into the pipe to bethawed, by means of a suitable apparatus easily movable from place toplace, and adapted t0 be connected With the pipe by means of a hose orthe like.

A further object is to provide in a device of the type specified, acasing in which the air is heated and from which the air passes to ablower and thence returns through the casing to an outlet from which itis conducted to the pipe to be thawed.

With the foregoing and other objects in view, the invention consists inthe novel construction, combination and arrangement of elementshereinafter described and claimed.

In the accompanying drawings:

Figure 1 is a view partly in elevation and partly in vertical section.

Fig. 2 is a view partly in top plan.

Fig. 3 is a perspective view of one of t-he air ducts.

The apparatus herein described is of such construction that it may bereadily transported by mechanics or other individuals having occasion tomake use of the device. A suitable supporting member is designated andis carried upon the legs 12 secured to said member 10 at the point 13,this structure constituting a stand or table carrying the casing of theblower and the hot air chamber and heating device.

rIhe casing of the blower is designated 14, this casing inclosing a fandriven by means of a gear wheel 16 meshing with a gear wheel 17 mountedon an axle 18 and operated by means of a crank 19. The casing of theblower is connected by a downwardly and laterally extending bracketmember 20 with the stand or table above mentioned.

The outlet for the casing is shown at 22 and has connection at 23 with aduct 24 passing through the casing 25 constituting a hot air chamber.Duct 24 extends through one wall of the chamber and is adapted forconnection with a section of hose 26 leading to the pipe to be thawed. Alaterally extending bracket member 28 serves to mount at 29 an arm 30having an offset portion 31 provided with a curved member 32 extendingpartly around the free end of duct 24.

The hot air chamber 25 is provided with a rotatable apertured plate 35mounted on the top and covering opening or openings 36 in said top, forthe purpose of controlling the temperature within the chamber 25. Thetop 38 is hinged at 39 and may be opened for the purpose of aiiordingaccess to the chamber. Air inlet apertures are shown at 40 in the lowerpart of the casing and the chamber may be heated by means of wastematerial saturated with oil or gasolene, 4placed in the lower portion ofthe chamber.

An air outlet duct is.designated and is located near the upper portionof the hot air chamber, extending thence to the central portion of thefan casing 14 and being secured thereto by bolts or the like passingthrough ianged member 47. The elbow 48 inv thisk duct or pipe 45 isprovided with a vent un'der the control of an apertured and rotatableplate 49 operated by a pin or the like shown at 50.

The waste material saturated with oil or gasolene having been ignited,the air passing from chamber 25 will enter pipe 45 and then-ce pass tothe casing of the blower, emerging through outlet 22 of said casing andpassing thence to the duct 24 where it is further heated before passingthrough the outlet of the duct last named and through the hoseconnection 26 and to the pipe to be thawed.

What is claimed is:

l. In a device of the class described, a hot air chamber, an air ductextending therethrough, a blower and a casing therefor connected withone end of said duct, the opposite end of the duct projecting throughthe opposite side of the casing, and a duct extending from the upperportion of the chamber to the casing of the blower.

2. In a device of the class described, a supporting member, a blowerincluding a casing mounted thereon, means for driving the blower, saidcasing being provided with an inlet and an outlet, a hot air chamber, aduct extending entirely through said chamber and having connection atone end with the outlet of the blower casing, and a duct connecting theupper portion of the chamber with the inlet of said blower casing.

3. In a device of the class described, a hot air chamber provided withair inlets -in the lower portion thereof and with an outlet in the upperportion, an air duct extending entirely through said chamber in asubstantiall-y horizontal direction and at a point spaced from the lowerwall of `the Loli-amber, a blower and a casing therefor lprovided withvan inlet and outlet, said outlet being .connected with one end .of saidduet, means Copies of 'athis ,patent may be obtained for for the airchamber, and a duet connecting the upper iportionzof said chamber withthe casing of the blower.

In testimony whereof Iaiiix my signature.

LEWIS A. BRENNAR.

ive cents each, -by `addressing' `the Commissioner .of Patents,Washington, D. (2.r Y

